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1.
以西瓜品种豫艺甜宝为试材,研究了生物菌肥在西瓜上的施用效果。试验结果表明,生物菌肥施用可以提前西瓜的物候期、提高叶片的光合速率和促进植株生长,每1 hm2施有机无机复混肥1800 kg+有机菌肥2250 kg和三元复合肥750 kg+有机菌肥2250 kg 2个菌肥处理分别比常规施肥增产19.48%、36.53%。与常规施肥相比,生物菌肥还可有效增加西瓜含糖量,提升品质。综合考虑各项指标,在本试验条件下,每1 hm^2施有机无机复混肥1800 kg+有机菌肥2250 kg的施肥处理为最优施肥方案。  相似文献   

2.
有机与无机肥料配施对微型结球白菜生长及品质的影响   总被引：1，自引：0，他引：1  
在施肥总量完全一致的条件下,研究有机、无机肥料不同配比对微型结球白菜生长、产量、产值以及营养品质的综合影响。试验结果表明,单施有机肥或单施无机化肥均比有机、无机肥料混配施用效果差;采用有机∶无机=2∶1处理的综合效果表现最好,其产量、净产值,可溶性糖、可溶性蛋白含量最高,分别为41.946t/hm2、7.93万元/hm2、40.2g/kg、3.8g/kg;粗纤维含量最低(93.4mg/kg),维生素C(274.7mg/kg)、硝酸盐(746.8mg/kg)含量中等。  相似文献   

3.
在施肥总量完全一致的条件下,研究有机、无机肥料不同配比对微型结球白菜生长、产量、产值以及营养品质的综合影响.试验结果表明,单施有机肥或单施无机化肥均比有机、无机肥料混配施用效果差;采用有机:无机=2:1处理的综合效果表现最好,其产量、净产值,可溶性糖、可溶性蛋白含量最高,分别为41.946 t/hm2、7.93万元/hm2、40.2g/kg、3.8 g/g;粗纤维含量最低(93.4 mg/kg),维生素C(274.7 mg/kg)、硝酸盐(746.8 mg/kg)舍量中等.  相似文献   

4.
以关口葡萄为试材,研究了硒矿物生物有机肥料作基肥对关口葡萄果实硒含量及可溶性固形物含量的影响。结果表明,施用硒矿物生物有机肥料极显著提高了葡萄果实硒含量,施用硒矿物生物有机肥1000 kg/hm2、2000kg/hm2和3000 kg/hm2的处理果实硒含量可分别达到0.079 mg/kg、0.109 mg/kg、0.136 mg/kg。施用硒矿物生物有机肥极显著提高了葡萄果实可溶性固形物含量,施用硒矿物生物有机肥2000 kg/hm2和3000 kg/hm2的处理,果实可溶性固形物分别达13.02%和13.58%,比对照分别高0.68%和1.2%。  相似文献   

5.
科技文摘     
《中国园艺文摘》2014,(12):227-236
长期大量施肥增加设施菜田土壤可溶性有机氮淋溶风险 可溶性有机氮比较活跃,在氮素转化和生态环境安全方面都有重要作用。该文研究了长期不同施肥处理（不施肥、施有机肥、传统施氮、优化施氮和秸秆还田）对设施菜田土壤矿质氮和可溶性有机氮含量及其在剖面累积的影响。结果表明,设施菜田土壤0～180？cm可溶性有机氮含量范围为29.1～88.9？mg/kg,占可溶性总氮的27%～50%；与不施肥处理相比,有机肥和氮肥的施用显著增加土壤可溶性有机氮的含量,并且随着化肥氮投入的增加可溶性有机氮含量也相应增加；其中,有机肥处理比不施肥处理可溶性有机氮在0～180？cm土层累积增加了1？132？kg/hm2,传统施氮比单施有机肥处理累计增加了？1？505？kg/hm2,秸秆的施用显著降低土壤无机氮累积量,但是对可溶性有机氮没有影响。综上所述,可溶性有机氮是设施菜田氮素重要的损失形态,其对环境的影响值得关注。  相似文献   

6.
以油菜为试材,采用田间小区试验,设置5个不同施肥处理,探讨有机-无机复混肥对甘蓝型春油菜(Brussica napus L.)产量、生物学性状和土壤理化性状的影响。结果表明:油菜田施用80kg/667m2有机-无机复混肥,对土壤有机质和作物养分、产量提高效果较好。  相似文献   

7.
《中国瓜菜》2019,(11):43-47
为探讨日光温室栽培番茄化肥减量施用技术,通过有机复混肥替代化肥减施不同比例氮,研究其对日光温室番茄植株生长、果实品质、产量、土壤酶活性、土壤微生物数量等各项指标的影响。结果表明,与对照CK(鸡粪2 000 kg·667 m~(-2)+常规化肥量333 kg·667 m~(-2))相比,有机复混肥替代化肥的减氮施肥处理可不同程度地促进番茄生长,增加产量,改善土壤环境。其中T3(鸡粪2 000 kg·667 m~(-2)+有机复混肥46.88 kg·667 m~(-2)+化肥283 kg·667 m~(-2))处理,即有机复混肥替代减施氮含量15%的化肥,效果显著,番茄植株生长状况最好,产量品质最佳。  相似文献   

8.
通过对不同肥料在西瓜上施用研究,分析了施用不同肥料可明显增加西瓜可溶性固形物的含量,提高单瓜重,增加产量的效果;不同肥料以等养分量有机无机复混肥料对提高西瓜产量,改善西瓜品质效果最佳。  相似文献   

9.
在田间条件下研究了有机无机复混肥时豆角、黄瓜和辣椒3种蔬菜产量及经济效益的影响。结果表明,豆角、黄瓜和辣椒3种蔬菜各施肥处理产量均以施用有机无机复混肥最高。施用有机无机复混肥能增加蔬菜产量,改善果实性状,提高经济效益。  相似文献   

10.
在田间条件下研究了有机无机复混肥对豆角、黄瓜和辣椒3种蔬菜产量及经济效益的影响.结果表明,豆角、黄瓜和辣椒3种蔬菜各施肥处理产量均以施用有机无机复混肥最高.施用有机无机复混肥能增加蔬菜产量,改善果实性状,提高经济效益.  相似文献   

11.
AIM: Although endovascular radiotherapy inhibits neointimal hyperplasia, the exact alterations induced by β-particles irradiation remain to be elucidated. The objective of this study was to investigate the ability and the cellular mechanism of local β-particles emission from 188Re to inhibit vascular smooth muscle cells (SMCs). METHODS: The SMCs in vitro were irradiated by 188Re with single doses of 2.6 Gy-25.8 Gy. The effects of β-particles on SMCs, such as effective irradiate doses, the period of inhibition for SMCs proliferation, the changes of cell proliferation rate and DNA synthesis rate, cell cycle progression and related gene expression, were investigated by cell count, [3H]-TdR incorporation, cell cycle progression analysis, cell viability and immunocytochemistry, respectivecy. RESULTS: β-particles irradiation with dose of 5.2 Gy could inhibit significantly SMCs proliferation. At dose of 20.6 Gy DNA synthesis inhibitory rate was 92%, SMCs proliferation rate was only 3%. Renoval of 188Re did not abolish the inhibitory effects of β-particles on SMCs proliferation. The expression of P53 was up regulation and PCNA was down regulation after irradiation. CONCLUSION: β-particles from 188 Re was significantly effective and permanent in inhibiting SMCs proliferation, and inhibitory effect was in dose-dependet manner ED50was 5 Gy, the best dose to inhibit SMCs proliferation was 20 Gy. β-particles irradiation induced SMCs to occur G0/G1 arrest, damaged the ability of SMCs reproliferation and led to cell clonogenic death. P53 and PCNA had regulatiory effects on SMCs proliferation after β-particles irradiation.  相似文献   

12.
多效唑对猕猴桃离体试管苗生长及内源激素的影响   总被引：18，自引：0，他引：18  
多效唑（ＰＰ３３３）处理猕猴桃试管苗，降低了其生长强度；植株体内的ＧＡ３、ＩＡＡ和ＺＴ含量下降，ＡＢＡ的含量上升，乙烯释放率增加；并且能降低外源的ＧＡ３和ＩＡＡ促进生长的作用，而外源的ＧＡ３和ＩＡＡ又能不同程度地逆转多效唑的抑制作用，使植株恢复生长。  相似文献   

13.
AIM: To investigate and screen the sensitive proteins in the formation mechanism of pathological scars by comparing the results of differential proteomic analysis between pathological scars and normal skin.METHODS: Two-dimensional gel electrophoresis was used to detect the protein expression profiles in 8 keloid patients, 8 hypertrophic scar patients and 3 matched normal skin patients.The proteins that showed differential expression of over 4-fold change were cut and analyzed by MALDI-TOF/TOF mass spectrometry.RESULTS: A two-dimensional protein profiling comparison between pathological scars and normal skin was successfully established.On average, 2 978 spots in keloid, 2 975 spots in hypertrophic scar and 3 053 spots in normal skin were identified using gel analysis software.Compared with normal skin, there were totally 36 differentially-expressed proteins in keloid and hypertrophic scar identified from the spots of over 4-fold change, including 16 proteins in both keloid and hypertrophic scar (8 up-regulated and 8 down-regulated), 11 only in keloid (9 up-regulated and 2 down-regulated) and 9 only in hypertrophic scar (4 up-regulated and 5 down-regulated).CONCLUSION: Proteomic analysis can identify the proteins with variance of pathological scars versus normal skin, thus providing probable new clues to reveal the formation mechanism of pathological scars.  相似文献   

14.
Historic landcover dynamics in a scrubby flatwoods (Tel-4) and scrub landscape (Happy Creek) on John F. Kennedy Space Center were measured using aerial images from 1943, 1951, 1958, 1969, 1979, and 1989. Landcover categories were mapped, digitized, geometrically registered, and overlaid in ARC/INFO. Both study sites have been influenced by various land use histories, including periods of range management, fire suppression, and fire management. Several analyses were performed to help understand the effects of past land management on the amount and spatial distribution of landcover within the study sites. A chi-squared analysis showed a significant difference between the frequency of landcover occurrence and management period. Markov chain models were used to project observed changes over a 100-year period; these showed current management practices being effective at Tel-4 (restoring historic landscape structure) and much less effective at Happy Creek. Documenting impacts of past management regimes on landcover has provided important insight into current landscape composition and will provide the basis for improving land management on Kennedy Space Center and elsewhere.  相似文献   

15.
AIM: Previous studies performed with XBP-01 in vitro indicated that XBP-01 could inhibit vascular smooth muscle cells from being transformed into foam cell and could eliminate the atherosclerotic plaque in C57BL/6J mouse. This experiment is to investigate its mechanism of eliminating plaques in vitro. METHODS: The cultured porcine artery smooth muscle cells incubated with XBP-01 of 0.1 mg/L for 24 h after preincubated with oxidized low density lipoprotein of 15 mg/L for 72 h in vitro. The samples were analyzed by fluorescence microscope, confocal microscope system and flow cytometry. RESULTS: Apoptosis was triggered by being incubated with oxidized low density lipoprotein and this process was accelerated additionally by being incubated with XBP-01. CONCLUSION: XBP-01 can be effective in eliminating atherosclerotic plaque by accelerating the process in which oxidized low density lipoprotein induced smooth muscle cell apoptosis.  相似文献   

16.
Species distribution models (SDMs) often use elevation as a surrogate for temperature or utilise elevation sensitive interpolations from weather stations. These methods may be unsuitable at the landscape scale, especially where there are sparse weather stations, dramatic variations in exposure or low elevational ranges. The goal of this study was to determine whether radiation, moisture or a novel estimate of exposure could improve temperature estimates and SDMs for vegetation on the Illawarra Escarpment, near Sydney, Australia. Forty temperature sensors were placed on the soil surface of an approximately 12,000 ha study site between November 2004 and August 2006. Linear regression was used to determine the relationship with environmental factors. Elevation was correlated more with moderate temperatures (winter maximums, summer minimums, spring and autumn averages) than extreme temperatures (summer maximums, winter minimums). The correlation (r 2) between temperature and environmental factors was improved by up to 0.38 by incorporating exposure, moisture and radiation in the regressions. Summer maximums and winter minimums were predominately determined by exposure to the NW and coastal influences respectively, while exposure to the NE and SW was important during other seasons. These directions correspond with the winds that are most influential in the study area. The improved temperature estimates were used in Generalised Additive Models for 37 plant species. The deviance explained by most models was increased relative to elevation, especially for moist rainforest species. It was concluded that improving the accuracy of seasonal temperature estimates could improve our ability to explain the patchy distribution of many species. Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.  相似文献   

17.
AIM: To detect the expression of cytoplasmic inhibitor of apoptosis protein 2 (c-IAP2) and growth arrest-specific gene 1 (GAS1) in Hodgkin's lymphoma (HL) and anaplastic large cell lymphoma (ALCL) and to investigate the role of two genes in the pathogenesis of HL and ALCL.METHODS: HE staining, the antibodies CD30, CD15, CD45RO and CD20 were used to screen the cases of HL and ALCL from 288 cases of lymphoma. The clarified HL and ALCL were subjected for immunohistochemical staining by SP and ABC methods to analyze the expression of c-IAP2 and GAS1. RESULTS: ①The positive rate of c-IAP2 in HL was 25/26(96.1%) while that in ALCL was 6/19(31.6%), there presented statistic significance between HL and ALCL groups(P<0.05), meanwhile the positive rate of GAS1 showed statistic significance between HL and ALCL groups(P<0.05). ②Two cases were showed to be a mixed type combined with large tumor cells of HL and relatively smaller tumor cells of ALCL.CONCLUSION: ①The different expression of c-IAP2 and GAS1 in HL and ALCL implied a different mechanism of oncogenesis and the different defects in the pathway of signal transduction of apoptosis in HL and ALCL;②Few cases showed an overlap and a likely transitional state between HL and ALCL; ③The different expressing manner of GAS1 and c-IAP2 in HL and ALCL implied the potential marks for the differential dignosis of two kinds of lymphoma.  相似文献   

18.
We tested whether size of habitat patches and distance between patches are sufficient to predict the distribution of the mountain vizcacha Lagidium viscacia a large, rock-dwelling rodent of the Patagonian steppe Argentina, or whether information on other patch and landscape characteristics also is required. A logistic regression model including the distance between rock crevices and depth of crevices, distance between a patch and the nearest occupied patch, and whether or not there was a river separating it from the nearest occupied patch was a better predictor of patch occupancy by mountain vizcachas than was a model based only on patch size and distance between patches. Our results indicate that a simple metapopulation analysis based on size of habitat patches and distance between patches may not provide an accurate representation of regional population dynamics if patches vary in habitat quality independently of patch size and features in the matrix alter connectivity. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

19.
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20.
XU Qi  DONG Er-dan  CHEN Kai  HAN Qi-de 《园艺学报》2002,18(12):1544-1547
β3-adrenergic receptor is the third subtype of β-adrenergic receptors. The genetic structure and pharmacological property of β3-adrenergic receptor are markedly distinguished from β1-and β2-adrenergic receptor subtypes. Recently studies show that myocardial β3-adrenergic receptor mediates negative inotropic effect through Gi-protein/NO/cGMP pathway, the expression of β3-adrenergic receptor and negative inotropic effect mediated by β3-adrenergic receptor are increased in heart failure. However, because of the low expression of β3-adrenergic receptor in the heart, the actual pathophysiological significance of β3-adrenergic receptor remains unknown.  相似文献   

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